And ceables kaiser



Sept. 4, 1928. 1,683,235

C. W. BOMAN ET 'AL PENCIL Filed May 17. 1922 il v l ,6 22..; AmRNEY.

Patented Sept. 4, 1928.

UNITED lSTATES CLAES WM. BOMAN, F BROOKLYN, NEW YORK, AND CHAR-LES KAISER, OF'CAEII'STADT, l

NEW JERSEY, ASSIGNORS T0 EAGLE PENCIL COMPANY,:OF NEW YORK, N'.v Y., A

CORPORATION 0F DELAWARE.

PATENT OFFICE.

PENCIL.

Application illed May 17, 1922. Serial No, 561,556. i

This invention relatcs to pencils, and particularl to pencils of the class known as pro e ing pencils in which means are providec for pro elling the'lead outwardly from the pencil-bo y as the -lead is Wornaway by use. l

The invention aims to provide a propelling pencil of neat and attractive appearance, and

of such simple yconstruction that it may be manufactured ata cost much less than the propelling pencils heretofore made.

Such propelling pencils as have heretofore proved practically useful have had pencilbodies consisting of a plurality of nested tubular members. Such pencilbodies have been.- comparatively expensive to manufacture because they have included a number of parts which-had to be accurately made in order to lit'together, and because of the labor necessary in assembling the parts.

A propelling pencil constructed 1n accordance with the presentinvention has a solid pencil-body of considerable length and of an outside diameter which may be the same as that of an ordinary wooden pencil. The pencil-body may be-made of Wood, and contains a small axial. bore for the'lead. The front; end of the pencil-body is tapered and provided with a metal ferrule which forces the materail of the tapered pointof the pencil-body inwardly seth-at it takes a frictional grip upon the lead. Onl'the rear end of thepen.- cil-body is mounted a thin metal tubular cap. A wire push rod of considerably greater lengththan the cap has-one of its ends securedto the cap near the rear end thereof. whileits other end projects into the bore of the pencil-bodyand engages the rear end of the lead.. Near the front end of the cap is stamped an internal helical boss by means of which the. cap-may be screwed on the pencil-v body. l-When the cap is turned soas to screw it forward on the pencil-body, thepushrod propels the-leadfforwardin the bore, .causing it to project'through from the tapered front end of the body. When the cap is screwed rearwardly on the pencil-body, the lead may be pushed back inside the body. A A-further lfeature of theinvention consists the pencil-body, which is normally covered moreor less .by'thecap or by a separate sleeve? a series of longitudinal groeven' in. which extravieads. maybe kept.

-n providing intheiupper or rear portion of In order that the iuvention'may clearly be understood, we will describein detail the approx-cd embodiments of it Vwhich lare .illustrated on an enlarged scale in the accoinpanyi drawings, in-wlnch:-.- 1

Fig. 1 is an outside viewv ofv the propelling pencil witlra short or partly used lead in posi tion for writing;

Fig. 2 is a central-longitudinal section ofthe pencil showing the' lead pushed backinto thobody;

Fig. 3 is a transverse section `on thexline 3--3 o'f Fig. 2; Fig. Lluis a transverses'ection- 4 4 of Fig. 2;

Fig. 5 is a side v iew, partly in section, of a -pencil having grooves for extra leads, the lcap .on :theA line I being shown removed from the pencil body;

and

Fig. 6 is a transverse section ontheline 6- 6ofFig. 5. 1

The pencil-body 10 is most desirably made .of wood and may have an outside diameter substantially equal to that of an ordinary Wooden pencil. It may be', and most desirably is', made polygonal in crosssection as `illustrated. The outerendll of the pencilbody is conical in form like the pointed end of a Wooden pencil, and a small axial bore 12,

'slightly greater in diameter than thel lead .to be used, extends :through ,the body.- The surface of the pencil-bodyfmay be painted or varnished or otherwise finished to give it an .attractive appearance similar to that of a high grade woodenpencil.l Y

' A conicaly ferrule 15 of thin metal having a' lead opening or hole 14 atits point covers and protects part of thc tapered end portion 11.

1 The furrule most desirably has u longitudinal 1 slot 16 sawed or otherwise cut .across itsiouter end. 'It isforced. onthe tapered portion 11 -ofthe body, and the parts of -it upon opposite t sides of the slot 16 are slightly Vpinched 'tonear the end of the-tapered portion'll of the body is forced'or compressed slightly inward,

reducing theend of the bore 12 toia size or `diameter such that itw1ll lightly grip the gather. In this operation the Wood. atl-'and v peint, und 'nmdertn laeuftl'ili support the been placed-in position.

opening 14 is most desir-ably of a size to exert a very slight essure on the lead, the slot 16 giving such e asticity to the vdivided end portions of the tip that such slight grip mary be `exerted without interferring `with the fee ing movementoftlie leed. In order to accurately size the opening 14, weind it desirable to form the opening in the ferrule originally. of such size that when the ferrulc has been forced :on to the end of lthe `encil, bodygas described `the opening 14 will e slightly too inna'll.'- :A steel-or other hard wire rodiof :Lpproximatelythe size-:of the lead, andinost vdesirablyvei slight-1y smaller than the lend, is thenppassed Athrough the -bore .to slightly enlarge the opening-,'14 to the desired size; e The ,ps'sindgc this-wire rodthr'ough the bore valso senves tosmooth out any.. slight unevenness vor slight roughness there might be in the sedncedxndofthe lbore so 'tlmtxthe lead may berfedpreadly therethrough. Owing, however, tothe .compressibility and the elasticity ofthe-wood of which-.the pencil body is made, the 'end 'of the bore remains of a siz-e'to frict-ion'ally rgrip the-lead with a desirable elastic pressure. By theconstruction ofthe pencil point .described there isf rovided means whereby the leed 'is supporte and Amost desirably lightly gripped, at the extreme end of' the pencil -pointhytheend of the -ferrule, and is held with a light grip in the reduced end of the bore 12 ata-point spaced slightly back from the point. "lhe lead is thus held very steady. A cap 20 which is placed on the rear end cf-thepencil-body 10 consists of a. thin metal tube having an appearance-similar tothe protective caps heretofore used on ordinary wooden pencils,andf may have :an eraser 2l -mountedin its rea-r end `in the manner that crasers are customarily mounted .in pencil piotectors. Near. the 'renr end of the cap, just vinside the cra-ser 2l, is alsmall wooden block 22 secured .by internal bosses 23 which are punched Yinthe .ca-p after the block yhas A wire push rod 9A ofmaterinlly greater length than the cap hs rearend secured in the 'block 22. The rod may conveniently fbe 4secured to the block in the-following manner :'-A small axial hole Yis ffonmed inthe block and the rod 24'l1aving its-rear end bent over is inserted in this hole from the freir andthe bent over rear end 26 of the-rod Yis driven i-nto the block. Near the openfnontendofsthe capQOla helical groove is formed-so as to-form an internal helical bossf? o'n'thi's'partofthe cap.

A lead 3Q, ofidiameter slightly .lessithan .-that. of the fmn portion of the `Abore-l2 and slightly greater than the normal diameter of the iront end offthe-bore,is placed in the rear .end ofithebor'e andI allowed to slide forward until lit-rem'rhesthe reduced 4front end of the bore. iSee F ig. 6:) The-push rod 24 is then `inserted in the rear end of the bore lxand 27 of the cap forming slight helical .depressions or screw .threads'28 in .the outer surface of the body ,as vthe cap is screwed forward, if such threads havenot been previously formed on the pencil-body. As the cap is screwed for-.vmrdlthe 'frontend of the push rod 24 enga-ges the rear cnd of the lend 30 and pushes the lead orward'runtilltheffront end ofthe lead projects through hole lll ,of the ferrule (SeezFiig. 1.9;' As the-front endofthe lend Vis wornawuy in writing the cup' 20 is screwed slightly. forward on the body, yczuis- Y ing the push rod v24 to propel the lead 30 outwardly. The frictionbetween the lead and the reduced front end of the bore 12 and the ferrule hole `14 holds the lead firmly in y osition and prevents it from .falling out. Nhen the ca is screwed backward, the lead may he pushe .backintothefpencil.

When a .lendBO'has been' used up, the cap -is unscrewed -from the pencil-body and -the push rod withdrawn and a. new lead inserted in thc rear end .of thebore 12, and the push rod and cap then replaced. A

When the pencil-body is made polygonal, as shown, the helical depressions 28 are formed by the helical boss-27, of Ithe cap only ut the angles-of .the body, and these tend rather to add tothan detract from the ap` pearance of the. pencil. If desired, the helical depressions may be stumped or other- Wise formed in the rear-portion of the outer surface of the body. before the cap 20. is applied. Ths iszusua'llly desirable, .especially when the :body is milde circular -in;crosssec tion, in 'which casein single continuous helical depression is formed.

ln order to Aprovide or'h'olding extra leads, the pencil bod-y is most desirahly -formed near its rear end with a plurality of longitudinal grooves 3l in its outer surface, as shown in Figs. 5 and` 6. These grooves are made of proper size .to receive and' lightly hold tho leads, so that while fthe leads .may be readily removed they will not-ordinarily fall out, und the grooves unost desirably do not extend uite to the rear end of the body. To cover t ie grooves 31 sufficiently for appearance sake and to insure against :loss of the extra leads when the pencil is in use,a sleeve is provided which is most desirably a slid'able band 33 made separate :from the cap 20 and adapted to bepushed- 'forward by 4the cap -us the cup is screwed forward .on the body. Making the lead-retaining Asleeve as efseparate band, lrather-thun as an extension of the cap 20 beyondits helicafl boss 27, 'has the yadvantage that it may remain on the pencil body in position to retain thelecds in the grooves when the cap is removed. If no sleeve were provided to extend beyond .the helical b o lill) llll') llo of the cap over the grooves 3l, the desired covering of the grooves could be secured only by screwing the cap further on to the pencil body, thus undesirably prolonging the operation of placing and removing the cap.

The' propelling pencils which have been described for the sake of illustration are the embodiments of the invention which we now believe to be most desirable. It should, however, be understood that the invention is not limited to the particular form of these embodiments.

What is claimed is:

1. A propelling pencil, comprising a solid wooden pencil-body having a small axial bore therethrough and having a tapered portion at its front end, a tubular cap mounted on the rear end of the pencil-body and having an internal helical boss near its front end engaging a helical depression in the outer surface of the pencil-body, a push rod having its rear end fixed in the cap near the rear end thereof,

rojecting beyond the front end of the cap E a distance materially greater than the length of the tapered portion of the body, and ext/ending into the bore of the body to engage the rear end of a lead therein, and a thin Walled tapered ferrule permanently secured on the tapered portion of the body to compress the front end thereof and reduce the diameter of the bore, said ferrule extending slightly beyond the end of the body, and being longitudinally slotted at its front end and having a hole at its apex of a size to support and lightly grip t-he lead, the surface of the body from the tapered end portion to the end of the cap being uncovered, whereby an extended portion of the surface of the wooden body is at all times exposed to facilitate gripping the pencil in the fingers.

2. A propelling pencil, comprising a solid wooden pencil body having a small axial bore therethrough and having a conical portion at its front end, a thin Walled conical ferrule permanently seated on the conical portion of the pencil body and serving to slightly compress the front end thereof and slightly reduce the diameter of the end of the bore, said ,ferrule extending slightly beyond the end of the body and being longitudinally slotted at its front end and having a hole at its apex of a size to support and lightly grip the lead, and means to engage the rear end of a lead in the bore of the pencil-body and force it forward through the hole in the ferrule.

3. A propelling pencil, comprising a solid wooden pencil-body having a small axial bore therethrough and having a conical portion at its front end, a thin-walled conical ferrule permanently seated 011 the conical portion of said body to compress the front end thereof and reduce the diameter of the end of the bore, said ferrule extending slightly beyond the end of the body and having in its apex a hole aligned with the bore in the body, and means to engage the rear end of a lead in the bore and force it forward and through the hole in the ferrule, the main portion of the bore being of a size to permit the lead to slide freely therethrough and the reduced end of the bore being of a size to lightly grip the lead, and the hole in the ferrule being of a size to support the lead.

4. A propelling pencil, comprising a solid wooden pencil-body having a small axial bore therethrough and having a conical portion at its front end, a conical ferrule of thin metal permanently seated on the conical end portion of said body to compress the front end thereof and reduce the diameter of the end of the bore, said ferrule extending' slightly beyond the end of the body and being longitudinally slotted at its front end and having in its apex a hole aligned with the bore in the body, and means to engage the rear end a of a lead in the bore and force it forward and through the hole in the ferrule, the main portion of the bore being of a size to permit the lead to slide freely therethrough and the reduced end of the bore being of a size to lightly grip the lead, and the hole in the ferrule being of a size to support and lightly grip the lead.

In testimony whereof, we have hereunto set our hands.

CLAES WM. BOMAN. CHARLES KAISER Sill 

